Attachment-plug and receptacle.



Q mwa G. B. THOMAS ATTACHMENT PLUG AND RECEPTACLE.

APPLICATION FILED 0CT.21,1915.

' I I II I I 1 (III I Iggy/ 1 Patented Nov. 21, 1916.

m and particiilarly to certain detaile of conneo rene."

T all :wiwm it may concern: E

Be it known that}, Gaoaon B. Tiioraae, a citizen of the Unit/eel Statesof America,

and residing, in the city of Bridgeport, county of Fairfield, "and Stateof Cox, necticut, have invented a certain new and- IrnproveqlAttachment-Plug and Eecepta?" cle,'of which the following is aspecification.

My invention relates to attaclnnentplug struction which constituteimprovements over that now commonly in use.

in the accompanying drawings, Figure lis a horizontal section through anattachment plug ankl receptacle in which my invention is. embodied. inone form; Fig. 2 is a plan of the receptacle alone; Fig. 3 is aninverted plan of the same partially broken away; Fig. 4;- is a crosssection on the lines 4-4, Fig. 2; Fig. 5 is a perspective of one of thereceptacle terminals; Fig. 6 is a cross section on the line (F -6, Fig.:2; Fig. 7 is an inverted. plan of the attachment plug alone; and Fig. 8is a plan of the insulating disk for the plug.

- As here illustrated, my invention is can bodied in a plug andreceptacle of the polarity type. The receptacle comprises a body 10 ofinsulating material having (lepressed ledges 11 on diagonally oppositecorners, on which the wire terminal plates 12 are secured by the screws13 piercing the. base from belowand taking into tapped holes in theterminal plates. Metallic yoke cars 14 at each end of the body affordmeans for mounting the receptacle in an outlet box (not shown) and alsofor securing in position theface plate 15. A flat annular boss 16 may beformed on the upper surface of the receptacle, which boss projectsthrough or into a central aperture formed in the face plate to receiveit. Within the area of this boss the body of the receptacle is piercedby two slots 17 and 18 lying at right angles to each other: Thetworeceptacle terminals 19 and 20 pro ect upward into these slots from thestraps 21 and Y22 to which they are secured by rivets 23 and to whichcurrent is conducted from the wire terminals 12 by the screws 13 whicheye tend from the latter to straps Qland let into the lower face of thebody 10 and un derlying the straps 21 and 22. These latter straps areelectrically connected. to the in the finished. device signed to cover.

have struck anchoring logs or projections hold the jack bases firm arraeeninnnmoe auzo nnciie'raome.

I Specification of Lethe-re. Patent. I Pghm' 'hefi Iilij li,

Application fillet. @ctooer 23, 191:5. Eerial lags. 57,1323.-

straps '25, and. also held in position in their channels in the lowerlace of ihe hotly 143; by means of counter-sunk screws 24%, E27,

passing (loam-marl through the oily 10,

slots 28 the ends of straps fifi'aml taking" into tapped holes in the *lscrews 2 2'2, are corona; wax anti. hire-wise the 21; lying}; thechaiinele in of the porcelain hocly lhere eonie danger however" ehe We.will shrink or otherwise become loose lrom hie J "v 10 as it harclensaiul thei it will iall out, time exposing the live concluctors which it,is de- To obviate iliis trouble l 29 from. the overlying straps 21 M622.When the w is .iiowecl'in molten conciltion into the strap clianeeleworks he neath the anchor lugs 29 and. the latter retain the wax aflJeriiihas harrienecl even should it iooaen from the walls of ihe channels,l i I loiiperating with this receptacle 1 proville an attachment plugwhich comprises .a holly 30 of insulating material pierced as 31 ioaiiniit the leatlii 3in Wires {not shown Depressed cells formseats'shapetl to the bases of the plug jacks 3 35, in "the form ofblades lying at right angles .to each other and spaced apart in properreref lotion to the holes 17 and 10 in the receptacle so that theyfreely enter the latter and engage the receptacle terminals 13, E28.Binfiing' screws 36 on the bases aiibrfi means for securing the liarcrioracle of ihe leading-in wires, Willie ring screws 3? In iihe fullyinserted position or the plug, the shallow depressions 38 formed in. thefaces of the jacks are engaged by the teats 39 on the contact faces ofthe receptacle terminals, and a spring engagement between the parts isthus established. which prevents the accidental Withdrawal of the plug.in order to form a closer} wiring chamber, 1 provide an infinilatingdisk 40 of stifi' paper or fiber which is provided with slots 4-1, 4-2lying at right angles to each other and in in their wells.

register with the 21l15 3i and so that it may be passed down over thejacks and seat- (ill on the shallow ledge 4-3 formezl Within the narrowperipheral rim ll on the enten ing face of the plug. in order to he ableElli ' insulatingbody of the plug I this rim is notchedv out at a onopposite sides of the plug, so that the finger nails or the end of ascrew driver may be passed beneath the inner face of the disk to liftthe same away from the plug body. A metallic casing 46 is fitted on theand spun into the wire hole 31 at one end and over the edge to removethe disk,

- of the rim it at the other end, thus securing ported from sulationhaving a channel in a it )ermanently on the plug.

he construction shown is economical of the type dereon the opposite faceof the block and underlying the wire terminals, screw means electricallyand mechanically connecting said straps and wire terminals and securingthe same upon said block, together with receptacle terminals carried byand wholly sup said straps and projecting into said slots, andsupplemental means piercing the blocks for securing said straps theretoand holding the receptacle terminals in ])OS1- tion in their slots.substantially as described.

2. In an electrical device, a block of inface thereof, a conductingstrap lying in said channel, an anchor lug struck from said strap and aninsulating composition covering said strap in the channel and engagingsaid anchor lug on all sides whereby said composition is held in thechannel by said anchor lug onthe strap.

3. An electrical device of the type described, comprising an attachmentplughaving an insulating block recessed on one face to form a wiringchamber, plug jacks secured at one end within said chamber andprojecting beyond the face of the block, and wire terminals electricallyconnected to said jacks within the wiring chamber, said face of theblock having a marginal rim and a shallow ledge inwardly offsettherefrom, in combination with an insulating disk slotted in registerwith said jacks and fitting'within said rim and against said'ledge withthe jacks passing through said slots in the assembled position of theparts, substantially as' described.

fl. An electrical device of the type described comprising an attachmentplug having an insulating face to form a wiring chamber, plug jackssecured at one. end withinsaid chamber and projecting and wire terminalselectrically connected to said jacks within the wiring chamber, saidface of the block having a marginal rim and a shallow ledge inwardlyoffset thereblock recessed on one beyond the face of the block,

from, in combination with an insulating.

disk slotted in register with said jacks and fitting within said run andagainst said ledge with the jacks passing through sald slots in theassembled position of the parts, said rim being notched out atpredetermined points to afford access to the edge of the insulating diskfor the removal of the latter. In. testimony whereof I have signed myname to this specification, in the presence of two subscribingwitnesses.

GEORGE B. THOMAS. Witnesses:

G. #V. Goooninon,

H. M. WICHERT.

